Improved die for forming bits and augers



UNITED STATEs PATENT OEEICE JAMEsswAN, 0E sEYIvIoUE, CONNECTICUT.

IMPROVED DIE FOR FORMING BITS AND AUGERS.

Specification forming part of Letters Patent N0. 96,847, dated November 16, 1869.

To all whom it may concern:

Be it known that I, JAMES SWAN, of Seymour, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Forming Bits and Angers; and 1 do hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

Figure l represents two blanks.

A is the preliminary blank after it has been cut and twisted into the form shown. A1 represents the same blank after it has been partially bent .and is prepared for the action of the dies. B C are the dies in which the blank is to be bent and swaged. C is the bottom die upon which the blank A1 is laid, and B is the upper swaging-die, to be operated compressively by any suitable mechanism.

The internal structure of the corresponding dies is such that they bring the blank to the form shown byA2 by the processes of bending and swaging conjointly.

The invention consists in constructin g and combining the dies B C to produce the result and operate in the manner set forth.

By means of my improved dies the whole can be done at one operation and with one heat. In performing the operation the upset blank A1 is laid upon the lower die, C, and the upper die, B, allowed to descend upon it. In its descent the die B acts as a swage, in connection with the stationary die C, and the two dies carry forward the metal, so as to upset the lips of the auger or bit near the screwpoint, at the same time turning the said lips over, as shown in Fig. 2. At the moment of closest contact the heated metal is forced to take the form of the interior of the two dies B C.

The dies B C are so formed that as they come closer andcloser they will swage forward the metal of the two lips, and turn the crude lips before coming in close contact asY drop-dies to complete the formation ofthe lips.

It will thus be perceived that the bending77 and"swaging are done in quick succession by a single instead of four operations, and with one instead of four heats, as is customary.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- The die for swaging auger-bits, constructed in two parts, B and C, and otherwise, as described and shown.

The above specification of my invention signed by me this 4th day of August, 1869.

JAMES SWAN.

VVituesses E. H. KNIGHT, B. W. SMITH. 

